Glass-cylinder cutter



L R. scum. GLASS CYLINDER CUTTER.

APPLiCATlON FILED JAN. I9, I920- 1,420,s67, v mama June 27,1922.

creates stares earner caries.

JOHN R. scorn, or onrannsnn; OKLAHOMA.

GLASS-CYLINDER CUTTER.

nastiest.

Specification'ofiLetters Patent.

Patented June 2-7, 1922;

Application filed January 19, 1920. Serial No. 352,486.

To all whom it may concern Be it known that I, JOHN R. SoonY, a citizen of the United7"States,anda resident of Okmulgee, in the county of Okmulgee and State of Oklahoma, have invented a certain new and useful Glass-Cylinder Cut ter; and I do hereby declare the following to be a full, clear, and'eXact descriptionof the invention, such as will unable others skilled" in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon,

be readily'placed in position and its tension maintained to keep it in contact throughout 'its length with the glass cylinder notwithstanding its expansion. Also means is pro.- vided for readily placing, removing and supporting a plurality of cutters. The invention may be contained in structuresof different forms. To illustrate a practical applicationof my inventionl have selected one of such structures and shall describe it hereinafter; The structure selected is illustrated in the accompanying drawings.

Figure 1 is a side view of the cutter and an end view of its supporting means. F 2 is an enlarged side view of the-cutter. Fig. 3 illustrates an edge view of a wire clamp. Fig. 4 is a top View of the cutter.

1 is a cradle on which the glass cylinders, which are of any suitable length, are laid. The cylindersmay'becut into any'desired number of parts. In the constructionshown the cradle l'is provided'with an extension 2 having a pair ofjbars 3'that form a suitable supporting track. A frame 4 is sup.-

ported on the bars 3 by suitable flanged. wheels 5. The frame 4 1s connectedto and supports the cutter. This provides a means whereby any number. of cutters may be shifted to any point or points along the cylinder as any number of frames 4v may be placedon the track and thus shifted to any desired position and operation of the cutters'sta rted asfast as they may be placed so that'any number 'of cutters may be operating at the same time.

The frames 4 are provided with arms 6 which. are pivoted to the frames. The arms 6'are of a length sufiicient that when they are turned down to substantially horizontal position they willextend over the" cradle 1 and'particularly over the topof the cylinder 7'placed in the cradle. A spring 8 may be connected to each arm 6 and to a bracket 9' in such a way as to be swung below the pivot of the arm G'when the arm 6 is down andabove the pivot whenthe arm. 6 is up. The spring 8 thus operates to hold the cutter down against the glass cylinder '7, what ever may be the diameter of the glass cylinder, within-ofcour'se certain limitations, and also to hold the arm 6 up out of the way when the arm 6 is raised soasto cause the spring 8 to pass the pivotof the arm 6. In

order to limit the backward movement of the arm '6 that would otherwise be caused by thejo'peration of the spring 8, the arm,

6'maybe provided with a suitable stop, such as the stop 10,. that may engage with the bracket 9 and thus 'holdlthej arm 6, through the operation of the spring, 8,- in an upright position. i c 1 i The cutter 11 is connectedto the arm 6 by means ofthe sleeve 12which surrounds the arm 6 and isslidingly adjustable along the arm 6 to bring thecutter over the axes of the cylinders notwithstanding any variations of diameter of the cylinders. I desired, the sleet e12 may be locked to the arm 6 by any suitable means.

f The sleeve 12 is provided with ears13 between" which may be placed the ear. 14

locatedon the cutter 11 and thus the cutter 11 is pivotally connected to the sleeve 12 by means ofthe-pin 15.

The cutter 11 isprovidedwith insulating.

blocks 16 which are secured to a plate 17 to whichthe ear 14 is connected. The elec? trodes or terminals 18 and-1-9 are secured to the insulating block 16 by means of the pins 20. A movable insulating plate 21 is located on the pins 20. The plate 21 is provided with slots 22. throughv which the. pins 2 extend. The blocks 1-6 are located onoppo site sides of the-plate 21 and one at each endof the plate 21 while the electrodes 18 and'19 extend in opposite directions and are also located on opposite sidesof the plate 21.

The edge 35 of the plate 21 may be shaped so as to conform with the contour of the objects to be cut. In the particular example illustrated, the edge 35 is curved so as to make it conform substantially to the curvature of the cylinders of glass that are cut by the cutting device. A wire 23 having suit able resistance is connected to the cutter by means of a pin that is located on one of the blocks 16. The wire 23 extends from the pin 24 underneath the electrode 18. The pin 24: is so located with respect to the electrode 18 that when the wire 23 is passed around the cylinder the wire will make contact with the electrode 18. When the wire 23 is placed on the cylinder it extends-beneath one of the blocks 16 and passes around the cylinder to the wheel 25. The wheel 25 is preferably a flanged wheel so as to hold the wire in place. The wheel 25 is so. positioned with respect to the electrode 19 that the wire 23 in extending from the surface of the cylinder to the wheel 25 will make good contact with theelectrode 19. Tnas much as the pin 2i and the wheel are so located with respect to the electrodes 18 and 19 that they press the wire against the electrodes, the moment that the cylinder is separated into its parts by the heat of the wire, the wire separates itself from the electrodes and thus the circuit through the wire is automatically opened.

Means is provided for keeping the wire under tension. The end of the wire is secured to a block 26. The block 26 may be provided with a suitable clamp consisting of the pivoted member 27 which is pivoted to the ear 28 formed on the block 26. The wire may be clamped between the arm or pivoted member 27 by means of the threaded angular rod 29. By rotation of the rod 29 in one direction the arm 27 will clamp the wire 23 at any suitable point near its'end.

The block 26 is slidably supported on a U-bar 30 which is secured to the cutter 11, such as to one of the blocks 16. The block 26 is provided with openings in which the U-bar 30 is located and thus the block 26 may be shifted along the U-bar 30. A spring 31 is connected to the block 26 by any suitable means and to the end of the U-bar 30. The spring 31 operates to pull the block 26 towards the outer end of the U-bar and in so doing keeps the wire 23 under tension and thus takes up any slack that might be caused by expansion of the wire and keeps the wire 23 in contact with the glass cylinder and the electrodes.

The plate 21 is by this arrangement located not only between the electrodes 18 and 19 but also between the portions of the wire near the ends and lntermediate the electrodes. The plate 21 is yieldably pressed against the cylinder 7 by means of the spring 32. The pulling of the spring 31 on the anse? wire thus indirectly operates to compress the spring 32 more or less by pulling with a relatively slight degree the plate 21 against the surface of the glass cylinder. The plate 21 prevents contact between the portions of the wire and consequent short circuiting between the portions of the wire located in the vicinity of the electrodes.

Suitable connection is made between the electrodes and the source of current supply. If desired, the connections may extend through the arm 6, to the frame 1, on which may be located a suitable switch 33 for completing the circuit of the wire 23 with a source of current supply.

I claim 1. In a glass cutting means, a track, a frame movable along the track, an arm pivoted to the frame, a cylinder cradle, a glass cutter supported on the arm, and a spring for delivering the arm towards the cradle and for holding the arm in a vertical position away from the cradle.

2. In a glass cutter, a pair of electrodes, insulating blocks for supporting the electrodes, a resistance wire for surrounding objects to he cut, means for anchoring one end of the wire and drawing the other end of the wire so as to press the wire against the electrodes and he object to be cut, and a plate having an edge conforming substantially to the shape of the object and located intermediate the electrodes and their supporting blocks and overlapping portions of the wire located between the electrodes.

3. In a glass cutter, a supporting frame, a pair of electrodes located at the ends of the supporting frame, a resistance wire extending around the object to be, cut and to the electrodes, and having overlapping portions located between the electrodes, a movable insulating plate located between the electrodes and between the overlapping portions of the wire between the electrodes. I

4. In a glass cutter, a supporting frame, a pair of electrodes located at the ends of the supporting frame, a resistance wire extending around the object to be cut and to the electrodes, and having overlapping portions located between the electrodes, a shiftable insulating plate located between the overlapping portions of the wire and movable between the electrodes.

5. In a glass cutter, a supporting frame, a pair of electrodes located at the ends of the supporting frame, a resistance wire extending around the object to be cut and to the electrodes, and having overlapping portions located between the electrodes, an insulating plate located between the overlapping portions of the wire and movable between the electrodes, a spring for pressing the insulating plate towards the glass, the plate being located between the-overlapping portions of the wire between the electrodes.

6. In a glass cutter, a Supporting frame, a pair of electrodes located at the ends of the supporting frame, a resistance wire extendingaround the object to be cut and to the electrodes, and having overlapping portions located between the electrodes, an in sulating plate located between the overlapping portions of the wire and movable between the electrodes, a spring for pressing the insulating plate towards the glass, the plate being located between the overlapping portions of the wire between the electrodes, means for keeping the wire under tension and in contact with the object to be cut and the electrodes.

' In testimony whereof I have hereunto signed my name to this specification.

JOHN R. SCOHY. 

